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Pooled sample estimate &- Population and sample A population is an entire set of events and its attributes. A sample is a small set of events taken from a population. When the properties of a population are unknown we estimate them from the values drawn in the sample. Statistics derived from the sample then become "estimates" of the population values. We need separate symbols to denote the population parameters, the sample statistics and the estimate derived from the sample. [Table goes here &- download the original to see it.]

Contents of Pooled sample estimate 1 Pooled sample estimate &- Population and sample 2 Pooling samples 3 Example of pooled sample estimate 4 Pooled estimator of the population proportion 5 Second Example of pooled sample estimate

Related articles: (1) Biased and unbaised estimates of population mean and variance, (2) Analysis of variance